karakteristisk er den ikke meget lange Kauda og dybe, 
brede Kanal. 
Apex byder ingen Støtte som Artsmærke, da den 
varierer efter Skallens Seulpturkarakter. 
Tab. VILL, fig. 18 er en trekarineret Varietet fra 658 
Favne (St. 312), der synes at staa nær den af Verrill i 
oveneiterte Arbeide afbildede. Jeg kan bekræfte Dr. Jef- 
freys Iagttagelse, at Dybyandsformerne af denne Art er 
hvide, hvorimod de fra grundt Vand er rødagtig eller rust- 
farvede. 
Tænderne, Pl. X, Fig. 15, 16, er sværdformede med 
et noget langt Manubrium. 
Forekomst: 79, 124, 164, 173 0, 192, 200, 251, 260, 
290, 312, 359. Magdalenebay (Spitsbergen) fra 30 til 658 
Favne. 
Var. geminolineata, Fr. 
Tab. VIII, Fig. 19. 
,»Catalog d. Spitzbergen Moll.“ (Jahrbiicher Mal. Gesell.) 
1879, Pag. 277. 
Formen fusiform, Spiret stærkt tilspidset og længere 
end Mundaabningen. Den axiale Sculptur bestaar kun af 
svage Veekststriber, Spiralsculpturen derimod af parvis op- 
trædende Linier; paa næstsidste Vinding er der 4 saadanne 
Liniepar. 
Der blev kun fundet et Exemplar paa 5 Favne, Ad- 
ventbay (Spitsbergen). 
Denne hoist eiendommelig tegnede Varietet kommer 
Varieteten lævior nærmest. 
Overgangen fra den typiske bicwrinata til Formerne 
cylindracea violacea og lævior ligger fuldstændig foran mig. 
Fra St. 192 og 312, 650 og 658 Favne, altsaa Artens 
dybeste Forekomst, haves Formerne: bicarinata, cylindracea 
og lævior. Jeg opfatter her violace i Overensstemmelse 
med Prof. G. O. Sarsi, 
I begge disse Tilfælde viser det sig, at unge Indivi- 
der har den skarpeste og stærkest udprægede Sclulptur, 
hvorimod de ældre, omend fuldstændig vel bevarede, har 
Tilbøielighed kun at bevare den underordnede Spiralskulp- 
tur. Dette stemmer 1 sine Prineiper overens med Prof. 
Verrills Iagttagelser*. 
1 Moll. reg. are. Pl. 17, Fig. 2. 
2 Cat. of Mar. Moll. 1882, Pag. 4 
16 
these are invariably — even if they only occur as lines 
of growth — curved. The most characteristic feature is 
the, not very long, cauda, and the deep wide canal. 
, Apex gives no assistance as a specific feature, because 
it varies according to the sculptural character of the shell. 
Pl. VIII, fig. 18 is a triply carinated variety, from 
658 fathoms (station 312), which appears to be allied 
to that illustrated by Verrill, in the above cited work. I 
can confirm Dr. Jeffreys observation that the deep-water 
forms of this species are white, whilst those from the shal- 
low-water are reddish, or rusty, in colour. 
The teeth, Pl. X, fig. 15, 16, are ensiform, with a 
somewhat long manubrium. 
Habitat: Stats. Nos. 79, 124, 164, 1730, 192, 200, 
251, 260, 290, 312, 359. Magdalene Bay (Spitzbergen) 
in from 30—658 fathoms. 
Var. gemminolineata, Friele. 
Pl. VII, fig. 19. 
Catalog d. Spitzbergen Moll. (Jahrbiicher Mal. Gesell) 
1879, Pag. 277. 
The shell fusiform; 
and longer than the aperture. 
the spire strongly acuminate, 
The axial sculpture consists 
of, only faint lines of growth, whilst the spiral sculpture 
consists of lines occurring in pairs; in the penultimate 
whorl there are 4 pairs of such lines. 
There was found, only one specimen, in 5 fathoms 
depth, at Advent Bay (Spitzbergen). 
This highly remarkably distinguished yariety approaches 
most to the variety lwvior. 
The transition, from the typical bicarmata to the 
forms cylindracea violacea and lævior, lies completely before 
From Stations 192 and 312, in 650 and 658 fathoms, 
consequently its deepest occurrence, we have the forms 
licarinata, cylindracea and levior. I regard violace in 
accordance with Prof. G. O. Sars! 
In both these cases, it is apparent that young indi- 
viduals have the sharpest, and most distinctly marked, 
sculpture, whilst the older ones, although perfectly well 
preserved, have a tendency to retain only the subordinate 
spiral sculpture. This accords, in its principles, with Prof. 
Verrills obseryations?. 
me. 
1 Moll, reg. are.“ Pl. XVII, fig. 2. 
* Cat. of Mar. Moll. 1882, pag. 483. 
